Abhatoo - Centre Nationale de Documentation

This study investigates the production of biochar from sludge derived from industrial and wastewater treatment processes for the removal of dyes from wastewater. Structural and mineralogical post-pyrolysis changes were analyzed using IR-ATR, showing significant alterations. The application of sewage sludge-derived biochar for methylene blue dye removal from aqueous solutions demonstrated a high adsorption capacity of 32.47 mg/g, according to the Langmuir isotherm model, which closely fits the experimental data, indicating monolayer adsorption with a high correlation coefficient (R²=0.99). Kinetic analysis suggests that the adsorption process adheres to pseudo-second-order kinetics, implying chemisorption, with a higher correlation coefficient (R²=0.9788) than pseudo-first-order kinetics (R²=0.8445), highlighting the biochar's potential as an efficient and eco-friendly adsorbent for dye removal in wastewater treatment.